So that's why Kim Kardashian has the highest number of Instagram followers!

The reality starlet went on a tweeting rampage Friday and shared an old photo of herself on Instagram wearing only lingerie.

In the photo, Kardashian, 31, kneels on a white chair wearing black bondage-inspired lingerie with black knee-high boots and has long, blonde hair. 

Kardashian seemed to credit her hot bod to being on a gluten-free diet as she captioned the image, “Gluten free is the way to be…Oh Hi.”

The 31-year-old last had blonde hair in August 2010 and has since tweeted new photos of herself proving she still has dark locks. In one close-up shot, she wrote, "I'm bored.... Oh hi!" 

Miley Cyrus recently credited her thin frame to eating gluten-free and was slammed by nutritional experts.

"Everyone should try no gluten for a week!" Cyrus, 19, tweeted on April 9. "The change in your skin, physical and mental health is amazing. You won't go back!"

However, experts spoke out to TODAY's Health and said only those who have been diagnosed with a gluten-related disorder should go on a gluten-free diet and it does not necessarily promote weight loss.